Avian flu, also known as "
bird flu," is an infection caused by
influenza (flu) viruses that occur naturally in birds. In rare cases, it can be transmitted to humans. There have also been isolated reports of human-to-human transmission. Currently, close contact with infected poultry has been the primary source of human infection.
In humans, symptoms have ranged from common flu-like symptoms (fever, cough,
sore throat, and muscle aches) to eye infections, acute respiratory distress,
viral pneumonia, and other life-threatening complications. Vaccines to protect humans against
H5N1 avian flu are currently in development.
(For more information, click Avian Flu. This article discusses the areas of the world in which human cases have been reported and looks at the currently available treatment options.)
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